accessing private properties of parent class which are set in the parent constructor. With php 5.3

gistfile1.php

    function __construct($someProperty)
    {
        $className = get_parent_class($this);
        $reflection = new \ReflectionClass($className);
        if (version_compare(phpversion(), '5.4', '<')) {
            $instance = new \ReflectionObject(unserialize(
                sprintf('O:%d:"%s":0:{}', strlen($className), $className)
            ));
        } else {
            $instance = $reflection->newInstanceWithoutConstructor();
        }
        $refProperty = $instance->getProperty($$someProperty);
        $refProperty->setAccessible(true);
        $refProperty->setValue($instance, $someProperty);
        $this->parent = $instance;
    }